Electric alarm-clock



(No Model.)

E. J. COLBY.

ELECTRIC ALARM CLOCK. No. 383,439. Patented May 29, 1888.

UNITED STATES PATENT OFFICE EDWARD J. COLBY, OF CHICAGO, ILLINOISELECTRIC ALARM=CLOCK.

SP'IEJCTFICATION forming part of Letters Patent No. 383,439, dated 29,1888.

Application filed February 1, 1888. Serial No. 262,690. (No model.)

To 0,25 whom it may concern.-

Be it known that I, EDWARD J. COLBY, a citizen of theUnited States,residing at Chicago, in the county of Cool; and State of Illinois, haveinvented a new and useful Electric Alarm- Cloclr, of which the followingis a specification.

My invention relates to alarm-clocks, and has for its object to providemeans whereby an ordinary alarm-clock may be used to start a secondaryor electrical alarm by closing the connection thereof. These objects Iaccomplish by means of the mechanism illustrated in the accompanyingdrawings, wherein-- Figure l is a detail view of a portion of the alarmmechanism of an ordinary clock, combined with a diagrammatic view ofelectrical circuit, bell, and battery. Fig. 2 is a detail,

sectional view of a portion of the alarm mechanism.

Like parts are indicated by the same letter in both figures.

A is a frame, and B B an ordinary mechanism of a clock.

G is an alarmmechanism shaft. 1% isapinion thereon, having a depression,S. Tisapin on the outer end of said shaft and beyond the pinion It andadapted to engage the face-plate U on said pinion, and also to fall intothe receptacle or recess S when reached.

:P is a spring secured to the frame A and encompassing the shaft C andbearing at one end against the washer V, which in turn bears against thepinion It.

I) is a terminal piece supported by the insulatingbloclis E E andconnected with the circuit-wire F.

G is a switch.

H is a further portion of the circuit-wire.

I is a bell in the circuit.

J is a battery, and K is the remaining portion of the circuit,which isconnected with the spring P at the point L.

The use and operation of my invention are as follows: In my device thereis geared to the ordinary clock mechanism a pinion provided upon itssurface with a depressiomand its shaft has a pin which keeps the pinionin a certain position on the shaft until said pin reaches thedepression, when the pinion is free to move upon its shaft and thus freethe alarm mechanism. A spring is provided which forces the pinion out oralong its shaft when the pin has reached this depression, this spring inthe meantime being depressed into a certain normal position. it is clearthat the motion of this spring may be used to close the electric circuitand thus spring into operation an electric alarm, and this is the devicewhich I have described, and seek to claim. I secure one end of mycircuit, in which an ordinary battery and bell are located, to themechanism of the clock or to the springpieec, while the other end of thecircuit I attach to an insulated terminal pieee,which is placed in thepath of the spring, so that when the spring is freed it rises andengages the insulated terminal, and thus closes the circuit. This putsthe bell in operation, and it will continue to operate until the circuitis broken, which may be by means of a switch or other proper orconvenient de' vice.

Having thus described my inventioinwhat I claim, and desire to secure bymeans of Let= ters Patent, is as follows:

1. The combination of an electric circuit with a battery, a bell, aclock, a shaft, a sliding pinion thereon intermcshing with aclocl gear,a spring which tends to force such pinion outwardly and which forms oneterminal of the circuit, an insulated contactpiece which forms the otherterminal located in the path of the spring, a pin on the shaft, andarecess on the pinion, so that at stated intervals the pinion isreleased and the spring permitted to move and engage the eontactpieceand close the circuit.

2. In an alarm-clock, the combination of a clock mechanism, a gearmeshing with such mechanism, a spring flexed by said pinion, a contactin the path of such spring, said spring and contact forming terminals ofan electric circuit, and a pin on the pinion-shaft, and a recess on thepinion, so that at stated intervals the pinion can move on its shaft.

EDWARD J. COLBY.

W'itnesses:

GORA L. CADlVALLADER, JoI-IN It. Nnrrnnsrnoar.

